11 files changed, 100 insertions, 69 deletions

diff --git a/drivers/ide/arm/icside.c b/drivers/ide/arm/icside.c
index fb00f3827ecd..e816b0ffcfe6 100644
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -365,7 +365,7 @@ static void icside_dma_timeout(ide_drive_t *drive)
         if (icside_dma_test_irq(drive))
                 return;
 
-        ide_dump_status(drive, "DMA timeout", HWIF(drive)->INB(IDE_STATUS_REG));
+        ide_dump_status(drive, "DMA timeout", ide_read_status(drive));
 
         icside_dma_end(drive);
 }
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index ee4d458e2bbf..892e42e80a32 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -295,7 +295,8 @@ static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
         int stat, err, sense_key;
         
         /* Check for errors. */
-        stat = HWIF(drive)->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
+
         if (stat_ret)
                 *stat_ret = stat;
 
@@ -692,7 +693,7 @@ int ide_cd_check_ireason(ide_drive_t *drive, int len, int ireason, int rw)
                 /* Some drives (ASUS) seem to tell us that status
                  * info is available. just get it and ignore.
                  */
-                (void) HWIF(drive)->INB(IDE_STATUS_REG);
+                (void)ide_read_status(drive);
                 return 0;
         } else {
                 /* Drive wants a command packet, or invalid ireason... */
@@ -1326,7 +1327,7 @@ ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
         if (blk_fs_request(rq)) {
                 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
                         unsigned long elapsed = jiffies - info->start_seek;
-                        int stat = HWIF(drive)->INB(IDE_STATUS_REG);
+                        int stat = ide_read_status(drive);
 
                         if ((stat & SEEK_STAT) != SEEK_STAT) {
                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 3cf59f2c3928..a4bb32883c6b 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -147,7 +147,8 @@ ide_startstop_t ide_dma_intr (ide_drive_t *drive)
         u8 stat = 0, dma_stat = 0;
 
         dma_stat = HWIF(drive)->ide_dma_end(drive);
-        stat = HWIF(drive)->INB(IDE_STATUS_REG);        /* get drive status */
+        stat = ide_read_status(drive);
+
         if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
                 if (!dma_stat) {
                         struct request *rq = HWGROUP(drive)->rq;
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index f8fe6ee128f3..3ac79ed2bc63 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -501,7 +501,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
         }
 
         /* Clear the interrupt */
-        stat = drive->hwif->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
 
         /* No more interrupts */
         if ((stat & DRQ_STAT) == 0) {
@@ -1246,7 +1246,7 @@ static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
                 u8 stat;
 
                 local_irq_save(flags);
-                stat = drive->hwif->INB(IDE_STATUS_REG);
+                stat = ide_read_status(drive);
                 local_irq_restore(flags);
 
                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 4bddef0c0b96..29cb043a2d3a 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -466,7 +466,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8
                 return ide_stopped;
         }
 
-        if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
+        if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
                 rq->errors |= ERROR_RESET;
 
         if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
@@ -493,7 +493,7 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u
                 /* add decoding error stuff */
         }
 
-        if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
+        if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
                 /* force an abort */
                 hwif->OUTB(WIN_IDLEIMMEDIATE, IDE_COMMAND_REG);
 
@@ -821,8 +821,7 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
 #ifdef DEBUG
         printk("%s: DRIVE_CMD (null)\n", drive->name);
 #endif
-        ide_end_drive_cmd(drive,
-                        hwif->INB(IDE_STATUS_REG),
+        ide_end_drive_cmd(drive, ide_read_status(drive),
                         hwif->INB(IDE_ERROR_REG));
         return ide_stopped;
 }
@@ -1231,7 +1230,7 @@ static ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
                 printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
                 (void)HWIF(drive)->ide_dma_end(drive);
                 ret = ide_error(drive, "dma timeout error",
-                                                hwif->INB(IDE_STATUS_REG));
+                                ide_read_status(drive));
         } else {
                 printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
                 hwif->dma_timeout(drive);
@@ -1355,7 +1354,8 @@ void ide_timer_expiry (unsigned long data)
                                         startstop = ide_dma_timeout_retry(drive, wait);
                                 } else
                                         startstop =
-                                        ide_error(drive, "irq timeout", hwif->INB(IDE_STATUS_REG));
+                                        ide_error(drive, "irq timeout",
+                                                  ide_read_status(drive));
                         }
                         drive->service_time = jiffies - drive->service_start;
                         spin_lock_irq(&ide_lock);
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 7647ac4cdef8..716244c45211 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -430,10 +430,10 @@ int drive_is_ready (ide_drive_t *drive)
          * about possible isa-pnp and pci-pnp issues yet.
          */
         if (IDE_CONTROL_REG)
-                stat = hwif->INB(IDE_ALTSTATUS_REG);
+                stat = ide_read_altstatus(drive);
         else
                 /* Note: this may clear a pending IRQ!! */
-                stat = hwif->INB(IDE_STATUS_REG);
+                stat = ide_read_status(drive);
 
         if (stat & BUSY_STAT)
                 /* drive busy:  definitely not interrupting */
@@ -458,23 +458,24 @@ EXPORT_SYMBOL(drive_is_ready);
  */
 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
 {
-        ide_hwif_t *hwif = drive->hwif;
         unsigned long flags;
         int i;
         u8 stat;
 
         udelay(1);      /* spec allows drive 400ns to assert "BUSY" */
-        if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+        stat = ide_read_status(drive);
+
+        if (stat & BUSY_STAT) {
                 local_irq_set(flags);
                 timeout += jiffies;
-                while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+                while ((stat = ide_read_status(drive)) & BUSY_STAT) {
                         if (time_after(jiffies, timeout)) {
                                 /*
                                  * One last read after the timeout in case
                                  * heavy interrupt load made us not make any
                                  * progress during the timeout..
                                  */
-                                stat = hwif->INB(IDE_STATUS_REG);
+                                stat = ide_read_status(drive);
                                 if (!(stat & BUSY_STAT))
                                         break;
 
@@ -494,7 +495,9 @@ static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long ti
          */
         for (i = 0; i < 10; i++) {
                 udelay(1);
-                if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) {
+                stat = ide_read_status(drive);
+
+                if (OK_STAT(stat, good, bad)) {
                         *rstat = stat;
                         return 0;
                 }
@@ -617,6 +620,7 @@ int ide_driveid_update(ide_drive_t *drive)
         ide_hwif_t *hwif = drive->hwif;
         struct hd_driveid *id;
         unsigned long timeout, flags;
+        u8 stat;
 
         /*
          * Re-read drive->id for possible DMA mode
@@ -633,10 +637,15 @@ int ide_driveid_update(ide_drive_t *drive)
                         SELECT_MASK(drive, 0);
                         return 0;       /* drive timed-out */
                 }
+
                 msleep(50);     /* give drive a breather */
-        } while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT);
+                stat = ide_read_altstatus(drive);
+        } while (stat & BUSY_STAT);
+
         msleep(50);     /* wait for IRQ and DRQ_STAT */
-        if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) {
+        stat = ide_read_status(drive);
+
+        if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
                 SELECT_MASK(drive, 0);
                 printk("%s: CHECK for good STATUS\n", drive->name);
                 return 0;
@@ -649,7 +658,7 @@ int ide_driveid_update(ide_drive_t *drive)
                 return 0;
         }
         ata_input_data(drive, id, SECTOR_WORDS);
-        (void) hwif->INB(IDE_STATUS_REG);       /* clear drive IRQ */
+        (void)ide_read_status(drive);   /* clear drive IRQ */
         local_irq_enable();
         local_irq_restore(flags);
         ide_fix_driveid(id);
@@ -850,15 +859,15 @@ static ide_startstop_t do_reset1 (ide_drive_t *, int);
 static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
 {
         ide_hwgroup_t *hwgroup  = HWGROUP(drive);
-        ide_hwif_t *hwif        = HWIF(drive);
         u8 stat;
 
         SELECT_DRIVE(drive);
         udelay (10);
+        stat = ide_read_status(drive);
 
-        if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
+        if (OK_STAT(stat, 0, BUSY_STAT))
                 printk("%s: ATAPI reset complete\n", drive->name);
-        } else {
+        else {
                 if (time_before(jiffies, hwgroup->poll_timeout)) {
                         ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
                         /* continue polling */
@@ -897,7 +906,9 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
                 }
         }
 
-        if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
+        tmp = ide_read_status(drive);
+
+        if (!OK_STAT(tmp, 0, BUSY_STAT)) {
                 if (time_before(jiffies, hwgroup->poll_timeout)) {
                         ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
                         /* continue polling */
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 9c07bdb68d1a..fd0ef8268950 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -264,8 +264,7 @@ err_misc:
 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 {
         ide_hwif_t *hwif = HWIF(drive);
-        int rc;
-        unsigned long hd_status;
+        int use_altstatus = 0, rc;
         unsigned long timeout;
         u8 s = 0, a = 0;
 
@@ -273,19 +272,17 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
         msleep(50);
 
         if (IDE_CONTROL_REG) {
-                a = hwif->INB(IDE_ALTSTATUS_REG);
-                s = hwif->INB(IDE_STATUS_REG);
-                if ((a ^ s) & ~INDEX_STAT) {
-                        printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
-                                "ALTSTATUS(0x%02x)\n", drive->name, s, a);
+                a = ide_read_altstatus(drive);
+                s = ide_read_status(drive);
+                if ((a ^ s) & ~INDEX_STAT)
                         /* ancient Seagate drives, broken interfaces */
-                        hd_status = IDE_STATUS_REG;
-                } else {
+                        printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
+                                         "instead of ALTSTATUS(0x%02x)\n",
+                                         drive->name, s, a);
+                else
                         /* use non-intrusive polling */
-                        hd_status = IDE_ALTSTATUS_REG;
-                }
-        } else
-                hd_status = IDE_STATUS_REG;
+                        use_altstatus = 1;
+        }
 
         /* set features register for atapi
          * identify command to be sure of reply
@@ -306,11 +303,15 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
                 }
                 /* give drive a breather */
                 msleep(50);
-        } while ((hwif->INB(hd_status)) & BUSY_STAT);
+                s = use_altstatus ? ide_read_altstatus(drive)
+                                  : ide_read_status(drive);
+        } while (s & BUSY_STAT);
 
         /* wait for IRQ and DRQ_STAT */
         msleep(50);
-        if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
+        s = ide_read_status(drive);
+
+        if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
                 unsigned long flags;
 
                 /* local CPU only; some systems need this */
@@ -320,7 +321,7 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
                 /* drive responded with ID */
                 rc = 0;
                 /* clear drive IRQ */
-                (void) hwif->INB(IDE_STATUS_REG);
+                (void)ide_read_status(drive);
                 local_irq_restore(flags);
         } else {
                 /* drive refused ID */
@@ -367,7 +368,7 @@ static int try_to_identify (ide_drive_t *drive, u8 cmd)
 
                 ide_set_irq(drive, 0);
                 /* clear drive IRQ */
-                (void) hwif->INB(IDE_STATUS_REG);
+                (void)ide_read_status(drive);
                 udelay(5);
                 irq = probe_irq_off(cookie);
                 if (!hwif->irq) {
@@ -455,7 +456,9 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
                 return 3;
         }
 
-        if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
+        stat = ide_read_status(drive);
+
+        if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
             drive->present || cmd == WIN_PIDENTIFY) {
                 /* send cmd and wait */
                 if ((rc = try_to_identify(drive, cmd))) {
@@ -463,7 +466,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
                         rc = try_to_identify(drive,cmd);
                 }
 
-                stat = hwif->INB(IDE_STATUS_REG);
+                stat = ide_read_status(drive);
 
                 if (stat == (BUSY_STAT | READY_STAT))
                         return 4;
@@ -482,7 +485,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
                 }
 
                 /* ensure drive IRQ is clear */
-                stat = hwif->INB(IDE_STATUS_REG);
+                stat = ide_read_status(drive);
 
                 if (rc == 1)
                         printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
@@ -496,7 +499,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
                 SELECT_DRIVE(&hwif->drives[0]);
                 msleep(50);
                 /* ensure drive irq is clear */
-                (void) hwif->INB(IDE_STATUS_REG);
+                (void)ide_read_status(drive);
         }
         return rc;
 }
@@ -521,7 +524,7 @@ static void enable_nest (ide_drive_t *drive)
 
         msleep(50);
 
-        stat = hwif->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
 
         if (!OK_STAT(stat, 0, BAD_STAT))
                 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index bf40d8c824ad..66801c084dd8 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1178,7 +1178,7 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
 #endif /* IDETAPE_DEBUG_LOG */  
 
         /* Clear the interrupt */
-        stat = hwif->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
 
         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
                 if (hwif->ide_dma_end(drive) || (stat & ERR_STAT)) {
@@ -1598,7 +1598,8 @@ static ide_startstop_t idetape_media_access_finished (ide_drive_t *drive)
         idetape_pc_t *pc = tape->pc;
         u8 stat;
 
-        stat = drive->hwif->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
+
         if (stat & SEEK_STAT) {
                 if (stat & ERR_STAT) {
                         /* Error detected */
@@ -1758,7 +1759,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
          * If the tape is still busy, postpone our request and service
          * the other device meanwhile.
          */
-        stat = drive->hwif->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
 
         if (!drive->dsc_overlap && !(rq->cmd[0] & REQ_IDETAPE_PC2))
                 set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 4e1da1c78cb5..2545dde6ee02 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -189,12 +189,11 @@ EXPORT_SYMBOL_GPL(do_rw_taskfile);
  */
 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = HWIF(drive);
-        u8 stat;
+        u8 stat = ide_read_status(drive);
 
-        if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
+        if (OK_STAT(stat, READY_STAT, BAD_STAT))
                 drive->mult_count = drive->mult_req;
-        } else {
+        else {
                 drive->mult_req = drive->mult_count = 0;
                 drive->special.b.recalibrate = 1;
                 (void) ide_dump_status(drive, "set_multmode", stat);
@@ -207,11 +206,10 @@ static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
  */
 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = HWIF(drive);
         int retries = 5;
         u8 stat;
 
-        while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
+        while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
                 udelay(10);
 
         if (OK_STAT(stat, READY_STAT, BAD_STAT))
@@ -230,10 +228,9 @@ static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
  */
 static ide_startstop_t recal_intr(ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = HWIF(drive);
-        u8 stat;
+        u8 stat = ide_read_status(drive);
 
-        if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
+        if (!OK_STAT(stat, READY_STAT, BAD_STAT))
                 return ide_error(drive, "recal_intr", stat);
         return ide_stopped;
 }
@@ -248,10 +245,12 @@ static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
         u8 stat;
 
         local_irq_enable_in_hardirq();
-        if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
+        stat = ide_read_status(drive);
+
+        if (!OK_STAT(stat, READY_STAT, BAD_STAT))
                 return ide_error(drive, "task_no_data_intr", stat);
                 /* calls ide_end_drive_cmd */
-        }
+
         if (args)
                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 
@@ -260,7 +259,6 @@ static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 
 static u8 wait_drive_not_busy(ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = HWIF(drive);
         int retries;
         u8 stat;
 
@@ -269,7 +267,9 @@ static u8 wait_drive_not_busy(ide_drive_t *drive)
          * This can take up to 10 usec, but we will wait max 1 ms.
          */
         for (retries = 0; retries < 100; retries++) {
-                if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
+                stat = ide_read_status(drive);
+
+                if (stat & BUSY_STAT)
                         udelay(10);
                 else
                         break;
@@ -430,7 +430,7 @@ static ide_startstop_t task_in_intr(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct request *rq = HWGROUP(drive)->rq;
-        u8 stat = hwif->INB(IDE_STATUS_REG);
+        u8 stat = ide_read_status(drive);
 
         /* new way for dealing with premature shared PCI interrupts */
         if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
@@ -465,7 +465,7 @@ static ide_startstop_t task_out_intr (ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct request *rq = HWGROUP(drive)->rq;
-        u8 stat = hwif->INB(IDE_STATUS_REG);
+        u8 stat = ide_read_status(drive);
 
         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
                 return task_error(drive, rq, __FUNCTION__, stat);
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 6c4f0f081785..68e5c632c5d5 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -287,7 +287,7 @@ static int idescsi_end_request(ide_drive_t *, int, int);
 static ide_startstop_t
 idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
 {
-        if (HWIF(drive)->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
+        if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
                 /* force an abort */
                 HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG);
 
@@ -423,7 +423,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
         }
 
         /* Clear the interrupt */
-        stat = drive->hwif->INB(IDE_STATUS_REG);
+        stat = ide_read_status(drive);
 
         if ((stat & DRQ_STAT) == 0) {
                 /* No more interrupts */
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 2f66aaa1be2f..d2124920ff10 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1309,4 +1309,18 @@ static inline void ide_set_irq(ide_drive_t *drive, int on)
         drive->hwif->OUTB(drive->ctl | (on ? 0 : 2), IDE_CONTROL_REG);
 }
 
+static inline u8 ide_read_status(ide_drive_t *drive)
+{
+        ide_hwif_t *hwif = drive->hwif;
+
+        return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+}
+
+static inline u8 ide_read_altstatus(ide_drive_t *drive)
+{
+        ide_hwif_t *hwif = drive->hwif;
+
+        return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
+}
+
 #endif /* _IDE_H */